EP 0741122 B1 19990825 - Process for preparing aromatic compounds through decarboxylation of aromatic carboxylic acids
Title (en)
Process for preparing aromatic compounds through decarboxylation of aromatic carboxylic acids
Title (de)
Verfahren zur Herstellung aromatischer Verbindungen durch Decarboxylierung aromatischer Carbonsäuren
Title (fr)
Procédé de préparation de composés aromatiques par décarboxylation d'acides carboxyliques aromatiques
Publication
Application
Priority
DE 19515985 A 19950502
Abstract (en)
[origin: EP0741122A1] Prodn. of an aromatic cpd. of formula (I) comprises decarboxylation of the corresp. benzoic acid of formula (II) in aq. soln. in the presence of an inert amine (III) which is insol. in water at pH 3-9 and a temp. of 70-210 degrees C. The reaction mixt. opt. contains a decarboxylation catalyst (V) and opt. an inert, water-insol. solvent (VI). R1-R5 = H, COOH, F, Cl, Br, CF3, OH, 1-4C alkyl, 1-4C alkoxy or NR'R"; R = R4; R6 = R1; R7 = R2; R8 = R3; R9 = R4; or when R1-R5 = H, then R, R6-R9 may also be COOH; R', R" = H, 1-4C alkyl or phenyl.
IPC 1-7
C07C 51/38; C07C 63/70; C07C 65/03; C07C 65/21; C07C 17/363; C07C 25/02
IPC 8 full level
B01J 23/72 (2006.01); C07B 37/06 (2006.01); C07B 61/00 (2006.01); C07C 1/207 (2006.01); C07C 15/02 (2006.01); C07C 17/363 (2006.01); C07C 25/02 (2006.01); C07C 37/50 (2006.01); C07C 39/02 (2006.01); C07C 39/24 (2006.01); C07C 51/38 (2006.01); C07C 63/70 (2006.01); C07C 65/03 (2006.01); C07C 65/21 (2006.01)
CPC (source: EP US)
C07C 17/363 (2013.01 - EP US); C07C 51/38 (2013.01 - EP US)
C-Set (source: EP US)
Designated contracting state (EPC)
CH DE FR GB IE IT LI
DOCDB simple family (publication)
EP 0741122 A1 19961106; EP 0741122 B1 19990825; CA 2175535 A1 19961103; CN 1138023 A 19961218; DE 19515985 A1 19961107; DE 59602845 D1 19990930; JP H0925256 A 19970128; SG 52792 A1 19980928; US 5739388 A 19980414
DOCDB simple family (application)
EP 96106480 A 19960425; CA 2175535 A 19960501; CN 96100260 A 19960426; DE 19515985 A 19950502; DE 59602845 T 19960425; JP 11085996 A 19960501; SG 1996009640 A 19960430; US 64187796 A 19960502